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Date: Thu, 12 Sep 2002 20:23:38 -0300 (BRT)
From: Rik van Riel <riel@conectiva.com.br>
X-X-Sender: riel@imladris.surriel.com
To: Andrew Morton <akpm@digeo.com>
cc: Urban Widmark <urban@teststation.com>, Chuck Lever <cel@citi.umich.edu>,
       Daniel Phillips <phillips@arcor.de>, <trond.myklebust@fys.uio.no>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: invalidate_inode_pages in 2.5.32/3
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On Thu, 12 Sep 2002, Andrew Morton wrote:
> Rik van Riel wrote:

> > invalidate_page(struct page * page) {

> That's the bottom-up approach.  The top-down (vmtruncate) approach
> would also work, if the locking is suitable.

The top-down approach will almost certainly be most efficient when
invalidating a large chunk of a file (truncate, large file locks)
while the bottom-up approach is probably more efficient when the
system invalidates very few pages (small file lock, cluster file
system mmap() support).

regards,

Rik
-- 
Bravely reimplemented by the knights who say "NIH".

http://www.surriel.com/		http://distro.conectiva.com/

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